I promised the update: and yes MB assist arrived (although took 4 hours) and patched it. I was lucky the hole was quite big and they guy didn't know at first if it will work or not, but 25 quid for a patch vs a new tire (Pirelli) x10 times is good bet. I didn't drive with yet, just took it around the block to make sure.
That's probably first time I thought I should have stayed with Pirelli run-flats and didn't change for Vredenstein. He said those are hard to buy and they don't carry them.
Mercedes 220d AMG Line Premium, Blue